From: phase90 (phase90@comcast.net)
Date: Thu Mar 25 2004 - 21:48:13 GMT-3
That gentlemen is true, the load-sharing is especially misleading because of
the ethernet-bundling-controller-logic. On some of the later switches I know
up to 8 Gigabit ports can be channeled together to generate a composite
bandwidth of 16 Gig full-duplex. However, any pair of
client-servers on opposite ends of the etherchannel will only use 1 of the
gigabit links based on the
ending mac hex digit combination.
Jerry
former CCIE candidate
----- Original Message -----
From: "Howard C. Berkowitz" <hcb@gettcomm.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, May 25, 2004 6:12 PM
Subject: Re: Balancing vs sharing
> At 10:57 PM +0100 5/25/04, Richard Dumoulin wrote:
> >Strangely (at least to me), although it is called balancing protocol, in
the
> >text they only talk about load sharing the traffic,
>
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/12
2
> >t/122t15/ft_glbp.htm
>
><http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/1
2
> >2t/122t15/ft_glbp.htm> .
> >
> >I have never understood the difference between load sharing and load
> >balancing !?!? Is the second term a particular case of the first one ?
>
> While the two are used interchangeably, I consider load balancing a
> special case of load sharing. Load balancing implies the most
> symmetrical possible sharing, although you can really only speak of
> balance in one, or a few, parameters. For example, per-packet load
> sharing does balance perfectly, with respect to bandwidth, if and
> only if you are sending equal-length packets to a single destination.
>
> Even if you are balancing bandwidth, you may be quite asymmetrical
> with respect to such a thing as out-of-order packets. Per-flow
> sharing will be better with respect to packet ordering, but if
> several large flows associate with the same interface, it may be less
> balanced with respect to bandwidth.
>
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